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O/T Need help in a hurry

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Allan in NE

10-18-2004 12:28:15




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Sorry for this but I need advice,

Electric company called and said that the power is going to be out for 3 hours. We run this online company via computers and just, absolutely cannot be 'down'..... ....

I don't care about the utilities or lights, but has anyone ever run computers from one of these smaller portable power generators? How clean is the voltage?

I have three UPS systems in place.

Thanks for your help,

Allan

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Kerry

10-18-2004 19:54:51




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 Re: O/T Need help in a hurry in reply to Allan in NE, 10-18-2004 12:28:15  
I'm probably too late too, but yes, I've run computers off a generator. Besides old tractors, I also mess with Ham radio, we do a thing called Field Day every year where we run radios and computers off emergency power out in the boonies (usually generator). The UPS will filter the power enough if it's a good one, you'll be fine. I have a little 5500w generator, but it's way overkill for radios and computers, I use it at the farm.

You'll need to know how many computers, monitors, etc. you plan to run at the same time to figure how much power you need, then give yourself about 20% extra to handle loads like startup current when you turn something on. Be sure to add any lights, etc. that you might need to run besides the computer. The same goes for when you determine the size of the UPS you need.

It's safer for the electronics if you turn everything off when you start or shutdown the generator, that's when the most spikes happen. Be careful if you try to fuel the generator while it's running, the labels will say not to do it.

I just bought at 5kva UPS for a rack of servers where I work, it was about $2300.00 from cdw.com. I doubt you'll need anything that big unless you're running a LOT of computers.

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Mark - IN.

10-18-2004 18:22:52




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 Re: O/T Need help in a hurry in reply to Allan in NE, 10-18-2004 12:28:15  
Probably too late now, but if aint, make sure you have real good UPS's between them to filter out the spikes from the generator.

You know Allen, if are running a business, really oughta have a good UPS, and not talking one of those $100, $200 dollar cheapies get from Circuit City or Best Buy. I mean a real UPS rated at like 3KVA, not so much for the power output, although that can be nice. I mean as a filter for either commercial or generator bad/dirty power, and lightening.

Is a company in Illinois, "ONEAC" that is one of the best in surge suppression, probably can do a google search for them. As far as UPS's go, FERRUPS, Best UPS, Alpha, Triplte (make surge suppressors too) and many others. For AC telephone systems or LANs, are a must.

What's the cost of doing business? So how about a little insurance? Think about backup or redundant hard drives to. I know, $$$.

If using AC, I prefer to configure: Commercial/Gen power into ONEAC/Triplite/Alpha brand surge suppressors, into UPS, then into equipment.

Nothing tops a rectifier DC system for backup and filtering (wet cells), too bad don't make DC powered computers.

Your bud, Mark.

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Allan in NE

10-18-2004 18:49:29




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 Re: O/T Need help in a hurry in reply to Mark - IN., 10-18-2004 18:22:52  
Hi Mark,

Well, I think that is what we have. They weigh about the same as a deep cycle boat battery and will hold us on for about 20-30 minutes with the power out? Brand name is UPS? Heck, I dunno, all I know is that they cost us $500 a copy. Hope they are okay. :>)

Trouble is, the power never goes out up here to speak of; last time was in what? '99 I think. But the darned lightning can really be a bear. These boxes have saved us more than once and we can hear those things snap when a strike is close by and they catch the surge.

Oh well, 'taint no use worryin' over it; either we'll get thru it or we won't. LOL!

Have a good one and hopefully, I'll be a yakin' with yas tomorrow morning.

Allan

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RayP(MI)

10-18-2004 17:49:31




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 Re: O/T Need help in a hurry in reply to Allan in NE, 10-18-2004 12:28:15  
Yes it can be done - I've done it. Your computer power supplies will clean up most of the worst of the crappy power. Try to keep your power demands well below the capacity of the generator(s) - don't overload! Try to keep your power demands relatively constant - don't connect things that are constantly switching on and off, like pumps and furnaces.

Now what I'd like to know, is how you have trained your power company to give you warnings on impending outages.... Mine just dumps us whenever, and you can always depend on several drops every time there's any thunderstorms, or even windy conditions. (Good old dependable Consumer's Power.)

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Brian/Pa

10-18-2004 14:30:01




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 Re: O/T Need help in a hurry in reply to Allan in NE, 10-18-2004 12:28:15  
why do you need 3 of them big brown trucks? lol



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JHesler

10-18-2004 13:00:08




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 Re: O/T Need help in a hurry in reply to Allan in NE, 10-18-2004 12:28:15  
That'll work and is a good idea but you don't really need to use the UPS's. The switching power supply in your computer will run just fine off of any old trash even square waves as long as the voltage is close.



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Kendall

10-18-2004 13:34:00




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 Re: O/T Need help in a hurry in reply to JHesler, 10-18-2004 13:00:08  
True switching power supplies will run off anything between 100 and 240VAC, but anybody using computers for business purposes need to plan on business continuance. You cant do that without a UPS. High end servers have dual powersupplies. Done right, one plugs into the mains, the other into the UPS. That way, no matter which goes down, your server keeps running.



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JHesler

10-19-2004 07:17:11




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 Re: O/T Need help in a hurry in reply to Kendall, 10-18-2004 13:34:00  
Huh? A little confusion there. SOME switchers will run off a universal voltage, NEARLY ALL switchers will run off trashy shaped waveforms even square waves and still output the clean DC they were designed for. I agreed that UPS is a good idea but not for use in cleaning up the waveform. The only use it would have is as a carry over if the generator stopped.



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big fred

10-18-2004 14:04:53




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 Re: O/T Need help in a hurry in reply to Kendall, 10-18-2004 13:34:00  
Of course anybody that's seen the movie "Jurassic Park" knows that even if the power goes out, there's a time limit to how long your UPS will keep things running. This is especially true if the UPS is running the computer that keeps the dinosaurs in their pens. Wonder if Allen is wearin his T-Rex repellant?



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Harold Sullivan

10-18-2004 12:58:34




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 Re: O/T Need help in a hurry in reply to Allan in NE, 10-18-2004 12:28:15  
I would call the power generator manufacture customer service, but they will want to know how much power in watts or amps. Harold



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Kendall

10-18-2004 12:37:01




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 Re: O/T Need help in a hurry in reply to Allan in NE, 10-18-2004 12:28:15  
Use the generator to feed the UPS. The UPS will clean up the voltage and keep everything cranking.



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dhermesc

10-18-2004 13:18:19




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 Re: O/T Need help in a hurry in reply to Kendall, 10-18-2004 12:37:01  
I agree with Kendall, thats the main purpose of the UPS. Our offices are about 200 foot from a huge transformer station, you'd be shocked how many times a day individual UPS will start beeping as the power ebbs and flows.



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